Show SOLVING II PROBLEM 4 I OF SHELTER Tho recent decision in favor of tho the Washoe smelter in Montana Mont has broucht out ont many points pint at t issue rc regarding th control of 01 poisonous fumes and gases emitting from the tho tho stacks stacks In almost western state whore where has every ever wester been en engaged a e in to tho the extent of installing install install- in ing inz smelters experiments have been conducted conducted con con- ducted ducted for the tho to control of these fumes fumes Somo of 01 these tests havo been unsuccessful resul and ono of the best results has b been n attained by the tho te United States Stats company com corn pany in its process proc which has bas been be successfully conducted conducted since sinco co eal early last lat summer in smelting lead lead A considerable amount of expense was as incurred by this company in getting tho the new Dew process perfected but that other concerns havo have expended n a greater amount is 18 i evident from an nn account given i by Frank Hall Hal of the Washoe ex cx- He says Bays in part part In Li the case of the tho Wah Washoe 0 tho the trouble I began bogan bosan soon after U Its now new works ero were started in 1902 but tho the company took steps to settle with tho the damaged parties and at the same time timo to investigate in gate gate- what what could bo be dono done to y this condition of affairs To a advance vance this highly important undertaking the they lj called caled In and at employed ono one of the tf most distinguished research chemists in the west Stuart Croasdale and aO him im carte carte- blanche blancho to try ty tuch uch experiments meats ments ment as ho he saw fit at tho the smelter smelter- In Inthis Inthis Inthis this investigation Mr r Croasdale was wa engaged for nearly nearl two years and at thc the end submitted liia bis report with as to the tho best means of remedying tho evil evi which were adopted Mid and ald at great cat expense carried ere ere- out U In In addition the tho Anaconda company sent its consulting cn engineer eor D. D ft W. is Brunton recently elected resident president of the Amer American n Institute of Mining Engineers Engi Enl neelS by unanimous vote to make independent in in- d pendent dependent investigations in il Europe fth rth instructions to invest investigate to every cry e arsenic t producing plant to be found there and on his return to t visit and inspect in inspect iu- iu every ever arsenic producing plant in tho United Unite States State Mr Brunton made mado the the- trip as directed and aDd when it i was finished rendered his report in in writing c. c His views coinciding on all nl material points with that of Mr Croasdale on their joint recommendation tat tho the present investigation at nt the Washoe works was S made mae and ad is pronounced pronounce by experts to toe tobe tobe be e th th best beRt in uso use Tho The Anaconda company is is still prosecuting pros pros- cut g in esti investigations on the tho samo santo line ln through its staff of experimental engineers engineers engi engi- is ners assisted by bv F. F J. J Folding of NewYork Now New York ono one of tho est chemical en engineers in jn in tho country Evidence at Trial In the course of the tho trial before uI Hunt some some- very interesting testimony mony was brou brought h out Mr r. r testified testified tes tes- that the elimination of solid substances substances sub sub- stances such sch as arsenic and similar materiale materials ma ma- from fumes fume has bas been a matter of special pedal by manufacturers of sulphuric sul suI acid for ninny years cars The Croas- Croas Brunton dale method IS IB the one used in inmost inmost inmost most of at tho the smelters whoa when the they make any attempt at nt all al to elmin eliminate to the arsenic and it is i tho the only method known that is accompanied by a n partial cooling and retardation of tho the gases and their dissemination by means of a bi high b stack Mr raiding Ft stated tc that the tho plan now not used in the Washoe smelter is iR the tho most complete and efficient of which he be has any knowledge The same samo sro opinion was held by E. E P. P Mathewson tho the superintendent ed who ho gave the tho various arious methods s tried tred dividing them into seven visions Great Cost of or Installation The first firt of these includes es tho those methods which come como under uder the head of cooling processes and tho the cooling may be done in in four different ways ays by water water wa wa- ter spray 1 by the admission of air b by br radiation and by freezing Tho The oth other r subdivisions are by the ba hou e process proc proc- ess ess by electricity friction by oy by filtering the gases by decreasing the velocity ot of the the Jaees gases and by bY centrifugal gas cas clean ers Most of these are not profitable for copper smelting Tb Th cost cst of ot installation Introit lation ranges between and andS S and the expense of operation from 1850 to a day By B either process ess the recovery of or arsenic was Was quito quite i insignificant n j |